{
  "manageEntity": {
    "action": "Save",
    "entityId": "954479",
    "entityType": "Track",
    "nonce": "0xae2dd46b5ab64481acb46b2d9fc2941a41b6e08246baf6b48014cdd6e4e35e35",
    "signature": "0xe7fd633bcc1de12777a03441fd0178623fe7099ac4334d545f4513c3fa34731534e997d4ead8c9f0982f77859390a3d538433b19144159bc00bad2759c0549dd1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}