{
  "manageEntity": {
    "action": "Save",
    "entityId": "1339699680",
    "entityType": "Track",
    "nonce": "0xb40d90e4217c9e026a9aeaf36246e3f117298172a157ab8e5950127de522edc9",
    "signature": "0x8c178270c723439d6b47c99a0129404b83af641bb313f077376074845be8489e1e6e92b48e85bf7887a2c108598b4ce42b42d8e0d5072a0304bc159b1aef05891c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}