{
  "manageEntity": {
    "action": "Save",
    "entityId": "1122005361",
    "entityType": "Track",
    "nonce": "1789911569097581991",
    "signature": "0xb02441a3fb4ae2c6516e9581bc394aa3e760f650dda9073134dd3465eb33b851422c5910111e14e6305ea8d5b300329d1fc19e1a5bab08e8bc3d1638eed94deb1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}