{
  "manageEntity": {
    "action": "Save",
    "entityId": "1095789404",
    "entityType": "Track",
    "nonce": "0x9a2905de6918de9d9e25ec756eed8c039cbb240f8ad8a5d3c6ba9abf2040e372",
    "signature": "0xec6d99ea1e7f8ce3bc69ab136a7cf0b3c5968e84ca0d5a342e4a72e58557c8bb4adb8245eac7e4c1f76987abd539b235948715bb36747f2f76b923c9c9993a971b",
    "signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
    "userId": "957488166"
  }
}