{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969962416",
    "entityType": "Track",
    "nonce": "0xa78873b399bfb9c2cf0187027a13e3d72b02175321f83529a8eb1d16d2ef57a9",
    "signature": "0x6b596ed76c68ffbd78a145b4177e26af44971cf1191a34ddfd6ddfb6deab95162f9ea4004086927d0304943d671e552a485182463a39cec697b78d8ca5bb4f391c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}