{
  "manageEntity": {
    "action": "Save",
    "entityId": "1582480407",
    "entityType": "Track",
    "nonce": "0xe9e89c182d6b37e5af537cd1d400df3c5482d5de383de8cdbddb9c5d53def078",
    "signature": "0xfed70fa15d93c0b326ef9664fc26a31d34a71a317960e23dbf4c237747c151bd0ea3aa0b51b24291411ad80f6e2ce81872b2706710476090ad729c39d9908edb1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}