{
  "manageEntity": {
    "action": "Save",
    "entityId": "192873315",
    "entityType": "Track",
    "nonce": "0xdf8e41acecd91ab994a7accd6450f551f6c0d1a7aa007e6aa60288ff00241503",
    "signature": "0x7e2c656b462b01975a7c7dc77c62b3c9240bc8d5bf97d8b9797f26e60f5fe1b840ea049aa31c04b14615c2a9880e59e5d19e363b286c539e684cc52c3419bcbf1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}