{
  "manageEntity": {
    "action": "Save",
    "entityId": "1523635428",
    "entityType": "Track",
    "nonce": "0x8ea5c3cd6499dd29c414e3aca1e834aca685628f42facfeb3b6a5b743a8ab47e",
    "signature": "0x7276a9593916beddae1ad766259ef500584b79e8f76bd501d62688984c05dfac1eb8cb72e015a370bf3c44a4a2e72b40ffd5a95d502b4e2190b889774659053f1b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}