{
  "manageEntity": {
    "action": "Save",
    "entityId": "1423211136",
    "entityType": "Track",
    "nonce": "0x3f767fa9a3c34ad43f67659acc466ecd61edab8d8d0d2f61317adb0efe7c4639",
    "signature": "0x28c71987c4c1f963993acfbfcd07367d69ca2bae8cde213c6a31c9aa5889ff0058b09586b964ba6a0763107456e56c5458f8dde8455f2946a3380006fd2820221c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}