{
  "manageEntity": {
    "action": "Create",
    "entityId": "134551757",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":181,\"entity_id\":661602969,\"body\":\"Oooo!!\",\"comment_id\":134551757,\"track_timestamp_s\":140,\"mentions\":[]}}",
    "nonce": "0x6e0e29ce6f32dc84a67b92acd60fc2bb648bf8890124a302b582cbdef9833b80",
    "signature": "0x747fca1a469e88b067b0bb8eae3fab877538a7049ac9ad0af016edc4ee87a9a15bb7e5af2e59449cd5200401c47644f83e90601c8fe2d62805457c30bdd6131b1b",
    "signer": "0x4e636627B2C38e64C8D3aF5889767393B4fE6C1A",
    "userId": "181"
  }
}