{
  "manageEntity": {
    "action": "Save",
    "entityId": "582037777",
    "entityType": "Track",
    "nonce": "0x2db938da22ce01809a243927ef05f47df7accb64d4ba27fc636a2bc4fbe6e164",
    "signature": "0xad5f7a64890d5586559fa2c2adcba5d20d3fab9efa2d3044b541ce2bed77dd2901fbc4a6ef1ae86df2880aa4d387e7d9f0f4e0b74b7c65f6acb3a7ffb0c4f8371b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}