{
  "manageEntity": {
    "action": "Save",
    "entityId": "527852",
    "entityType": "Track",
    "nonce": "0x0a872946f129ae561d68c5399010623c83f017edc85d9832667d43b1c69503e4",
    "signature": "0x044e5400fde9333ee6b977bfab45a7689b3f05918bea52b3a06904aa8ad3a4722a02740879059da5f3c0bc0850ee955bd7aebe11a67ae983932dc130224b83cf1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}