{
  "manageEntity": {
    "action": "Save",
    "entityId": "993096878",
    "entityType": "Track",
    "nonce": "0x7040840f0c0d76e9bf42af0f438ce2c76e29b1c51319b337add826dfaa8d8475",
    "signature": "0xbdff106edbc1cbc87adadb451b0d784c5e2007573a365d410300ad6c089e392326ac3042c71773a0c388689e7aea9ae950fcb5cd19e509e2e064aa6ece2425151b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}