{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580353447",
    "entityType": "Track",
    "nonce": "0xfbf43b1ffa175efd7797d795f02a9b460cdcaecbfd6c53bf20fa6421ab403d51",
    "signature": "0x0a7a3ed722efa8fbbeb49eea93200475138e5d8feda7246bdedab19cc726f55e34b835d2ed0e14a5131c666833347ea32fefa6195d13e526b62a2203671998591b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}