{
  "manageEntity": {
    "action": "Save",
    "entityId": "527144784",
    "entityType": "Track",
    "nonce": "0x3b5d1989912b1048aa8841d3f830dc3c7c80613558aa92bf9d4b894f624331fa",
    "signature": "0xdd81de5f127a28cabae3498afab0ac90e227a498abbd9bb3dffee80367fd0fa03d5f8f876d342c5e14ba030897e15c18b75b9266a9cf526f95efa3994b1a0a261c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}