{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054927",
    "entityType": "Track",
    "nonce": "0x4e9b1d21b1e000fc4fb1a6ef796cf34c961513f7beb55b4571bc173997e5919b",
    "signature": "0x9d4ba9d4e246ab1e8029db77cb4728535006514ea5a5de6ce6a35cd01ff60e6338120b51b876daf498d382a168fbe6ca3f219c38f4514498f2ea9cfcb4661db51b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}