{
  "manageEntity": {
    "action": "Save",
    "entityId": "1272967956",
    "entityType": "Track",
    "nonce": "0x0ca3f111222a6c9fe2dd5dab88e800cc23963f37cbe75f84b0cf8130896db425",
    "signature": "0x2f2ede1fe7a8aa38d03aafd1a88ece5814ba1caf20e8345fd26c6b76e6e19ac55be0bc2f35ecf41085b0b0103d13dfdb9d3e628c17b8a40b2dea73e8561fdbf21c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}