{
  "manageEntity": {
    "action": "Save",
    "entityId": "418787",
    "entityType": "Track",
    "nonce": "0x6238ae983d52eb4507c1c7c4dc7b4f6f6e5ecee9048236eda2b13716817eaf52",
    "signature": "0x578f3cdd7aa6885fc76a3b0ab7e97b7fffd3137dc91e63af284a4669a42794bd61f8a57b3b936040362b76082128837d5ece71c3e5b5566239afc63455359aa51b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}