{
  "manageEntity": {
    "action": "Save",
    "entityId": "259025",
    "entityType": "Track",
    "nonce": "0x659ac3a42623b375984cb6eedc0fee87eb86e2b651855629f91318940a0360bd",
    "signature": "0x89aa53f6f5969e7ecab1a17d137d7a82e76810bc7698435c1d10149dc8b7bf3901666f78bdc88522b71c533de66de19d27aebfd95d8a87bf1aee67d7076cd8a11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}