{
  "manageEntity": {
    "action": "Save",
    "entityId": "614281",
    "entityType": "Track",
    "nonce": "0xf4b021844dbdf3fb634e7810899ede2315b0a36fb48dae5b0318914a2e4e084b",
    "signature": "0x2c1fc290fb1007348080bdbe5064f8047a66120f3f7cf9a10a0b688f4aa3da3d146debb53a5f90e1023ff867c18a9664a6a6a5fb82be5ba2764f4d183bc0c0721b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}