{
  "manageEntity": {
    "action": "Save",
    "entityId": "1904610914",
    "entityType": "Track",
    "nonce": "0xcea3db53b7804dc49389a344db08a39f8a597b4e22370301f522d8a151564247",
    "signature": "0xa0841be1cd2818ee0ad7f80d7e3a3996c36a632e33dde899d94c873d31ff98e308248e4b5b1bc6c138c15004b672c728f059c0de0eeaf2bef4acd195f839a2371c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}