{
  "manageEntity": {
    "action": "Save",
    "entityId": "488414941",
    "entityType": "Track",
    "nonce": "0xd3aad488009e2586cd0a5c778e66b93d5da9ccac316a7c1b9eac8bc5556c2f9f",
    "signature": "0xce5e7c4b2014b155cee457a9ec6fa9dc13f62b40e1a8751df012a324e107036d0901cc6c596465bbddde9eaf4be56c03995094ee788bbf81ec781c441d818fc11c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}