{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066287140",
    "entityType": "Track",
    "nonce": "0x038b55a65fe54b4bdcb1437a7886ca1c76868826f0decc604fffd4f13ae03e14",
    "signature": "0x41a3a774a9721d2698ff51157d094468e207c5b64ff8c1d3fa8a8d83aa084f5047bc53676b472b5e89d66d7a4f1f7e2cd4cf0283c46cd19a747fe7f1b8cd18801c",
    "signer": "0xc6A421843C183591853a72f2afe7AF4CcFbc4FA1",
    "userId": "344756485"
  }
}