{
  "manageEntity": {
    "action": "Save",
    "entityId": "291618",
    "entityType": "Track",
    "nonce": "0x3fb14f057ab5d0af6f1e6efb68fbddfe192fa4c423890989cf5002d43aa1f104",
    "signature": "0x0ad9e655fba01025de95c61e3c0a029770250830e30c523fd50d735ebd2c7c9c3457ed4bba500480d715b4bbdac8d78814c1921e2e89b53488f10fc3317d98081b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}