{
  "manageEntity": {
    "action": "Save",
    "entityId": "1813607148",
    "entityType": "Track",
    "nonce": "0x066d9e324ab79daa4e43b9c2ccf71c8d90e5eb995396f36a7118e2aae4af4a31",
    "signature": "0xa0a4f88d8d6c7788d615537dc2d7e5d15b3976a4684271a065a39ca6111e784e3509346feab8dca16118cd5e0168776585c8ac765fc7b872a654ab7f216c46f31c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}