{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125110173",
    "entityType": "Track",
    "nonce": "0x11c0defc865069de3dd4e9c035460271258dfcba5ad52f2dba9137154207423e",
    "signature": "0x8bcf5ff0d8121dd98d53d3f4371bcb20b9806eb8ee48d8a19e12c03c305c19e417b9895491545eb6ce8d8e630f4172655147e680e1bb1e9e82a4bbbc7d4b7d7c1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}