{
  "manageEntity": {
    "action": "Save",
    "entityId": "37262542",
    "entityType": "Track",
    "nonce": "0x94f293343287cc68f49518c422f25c5ed0b6bd0cd36091c8dfff8b8fd785746e",
    "signature": "0x9b989ee8caa094d604385bd4013d354ced730f46a193715523cb238aba084b2c0d040503f08569554e884ab51d7a070d87cab99b84823931c79df69947a7ee511c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}