{
  "manageEntity": {
    "action": "Save",
    "entityId": "2134576602",
    "entityType": "Track",
    "nonce": "0xead8b956f0a8f839b5c0fd9858a04aa3a0b641e194ce7f16dafcb64e5cc214bf",
    "signature": "0x9ac623aec47b2751c35526a8b2a19e19930420058f43d49315380e7a4cd19a681134164a647d008bc85a6800d3accff22e592ae8c0a0616d85b05709446db8dd1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}