{
  "manageEntity": {
    "action": "Save",
    "entityId": "330433005",
    "entityType": "Track",
    "nonce": "0x4744561696c285bcb0806e2cbe0c37fa05cfc965ca7a9098fe3b3c58eccd0695",
    "signature": "0xae0bab1c5223514b362943f1772a5b7ba3fa6a8419907119ab3557a5d2b4a7756d4e7583a899eef8cc96d077051bb40b2da17410fdeb0f34751fbb4e532596431c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}