{
  "manageEntity": {
    "action": "Save",
    "entityId": "774007",
    "entityType": "Track",
    "nonce": "0xe7473a0473bd15d78c07df5e733a38f385acdecc57c9c1aea1defcd3ae951c34",
    "signature": "0x0f6b75073385f0326a028bb9f787414571018f8c3d1498209123c6f1e8f79aaa104da3a75b8fd12a15806dd69192e7ce30d5703baa3d45215a059d5bd64ffafa1b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}