{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969764030",
    "entityType": "Track",
    "nonce": "0xb5b7bdb99848f1a92b0f77720b93dc731f191e53a68a3b48a309b846f12a7a3d",
    "signature": "0xcc8a0125984309a5d56c8a49dfbdd942bb53eddf3f0b6f4680688bc4b12b948169b8a7062457908449ef4e2d992c2a06947054a6fa68bff8e58420ff39ccf8681c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}