{
  "manageEntity": {
    "action": "Save",
    "entityId": "1762660218",
    "entityType": "Track",
    "nonce": "0x3950d5f3bd186e7232eac5e1f16e6f4197228e65cdd5cff15b25f8ca3e6a21e7",
    "signature": "0xee84e289e2b6efcc20a6b477ae62c2f112966d6e45e9fffa77a934f7ea88238843e903655b2f26dd93c2c042baf428df5c2af7e2b9d307f401fe9cfe3343d7ba1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}