{
  "manageEntity": {
    "action": "Save",
    "entityId": "974341129",
    "entityType": "Track",
    "nonce": "0x21ad69ea44fa076779b4b81235416e528dab47cdba33e823055af2407bd13dda",
    "signature": "0x46ea51fdcaa2917c6d35c487b8dbb34be7b6a4c0a0eba581fe9f3a5dabaa704c3fa5490c99c92523cfac8e0697eb7a55ffca793de1840a2a73b126d5df65e0d01c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}