{
  "manageEntity": {
    "action": "Save",
    "entityId": "275173",
    "entityType": "Track",
    "nonce": "0x894c48e5cfc47242289c6f5dccbf9daf656d8623665e1a408be6939af8917395",
    "signature": "0x69c44fe8443105fbf6793efaaac918f8686c2ecbf443a0ce4016e186cc4533e8538f427623ef7677b4c74c2512fe998c05b9fd65d0b2ed063d1be8c7b5d490501b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}