{
  "manageEntity": {
    "action": "Save",
    "entityId": "1460460512",
    "entityType": "Track",
    "nonce": "0xb2557b32dba61b1f00e91fdfa2cabae0677ceab4e50a18f6dbfcd30226a00dbd",
    "signature": "0xcc9beb2f76faeac8c0e2b2d7142fbbec112d8ab2a7131bebd648fdeb7b8caeb207f9b426b76e056731e0b8f60d8fa21fe9e1591749a82b9ec8a8194adbfb55dd1b",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}