{
  "manageEntity": {
    "action": "Save",
    "entityId": "1140766760",
    "entityType": "Track",
    "nonce": "0x19852fa0ba834a2702674e73e5afb98f6dc32081524b6cacf5e9fe61f5d86cab",
    "signature": "0xb7914d94e0e2d42eb4118c09dc0f573bd1a194fd6ca7e0f1c21cd0d09ab6a9b46eb4440604db77ca4d9c828d381afbd7944e959c21d9daffb1c3ab90f2ebef601c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}