{
  "manageEntity": {
    "action": "Save",
    "entityId": "288766225",
    "entityType": "Track",
    "nonce": "0xc14b72f02bd3039394e387e58795e0bc7032bb2a5a1eac7501ac78b23b4fc51d",
    "signature": "0x40c316888068db10b61c17e7c2418894cc3497dde795dae689ad9ff59e9af22458a29773f35b35c2d3bc20574d1cacdfe166b01e3012d405ae8e95b38e606c761c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}