{
  "manageEntity": {
    "action": "Save",
    "entityId": "969029306",
    "entityType": "Track",
    "nonce": "0x398be631cec98f1db048e37397c9efda254b5e59f66b97c9330e4d4cd9126147",
    "signature": "0xb4284d3b86a0d022f03722e413c7d77e89cc10130912644e25c6ac9a47a6a40878bdffae168417b2915a343f6504b1dc62227927847614f1ec53f9cd743255e71b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}