{
  "manageEntity": {
    "action": "Save",
    "entityId": "1874650930",
    "entityType": "Track",
    "nonce": "0x0cd5b93df0fe45e7fffd3099f76662158f1b77afdad42881cd680972a53d33f3",
    "signature": "0x971c99c809c8dbd58104ca95ed981ff96864db4719fe0e14adb884ceee0581b5699ef85205647eb37fd4f41ba8d069791bcf60ce3d587a6edea74dd8448a2df91c",
    "signer": "0xfDD86dA2081039B574A1b90e23943c722aB9aad5",
    "userId": "626777695"
  }
}