{
  "manageEntity": {
    "action": "Save",
    "entityId": "802825",
    "entityType": "Track",
    "nonce": "0x9c9b1823571b51fe703a6f17ac23b97e2d5f1209ba07169bb2636191578fd10e",
    "signature": "0x54f3490a32449b37ccbbde3595afee8f086e7770532e2aee54b2c304bcf94bf32a61ff073011f61607e8523afc07a401bee95feb737ced4b9ac4413fb7bd06ee1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}