{
  "manageEntity": {
    "action": "Save",
    "entityId": "971110",
    "entityType": "Track",
    "nonce": "0x3a9ef47a33ef4d92a1587c99998c268a7febbe65ed655ead71c2eade48db1fab",
    "signature": "0x0227bae9d444b14b5367323b8dc1baeaa2125352bee5749fa588aaba13b7ad9470bdb3131a40f377c440ddf2d5c5362d0419d74c9e7788cbb19b6d7ecae823181b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}