{
  "manageEntity": {
    "action": "Save",
    "entityId": "831461448",
    "entityType": "Track",
    "nonce": "0xb4e413d812d4a2c9dee680fc2dcec3fa48774a88265020bfe977821ccb23c966",
    "signature": "0x462504da1ea75c5255ed69a87aac1711aaf806faa584533eb2bd73db85fedbda01b814715970052e4835e1afd4c69d8a92f544c933f85121db0488255d9a42c61c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}