{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252330406",
    "entityType": "Track",
    "nonce": "0x6e2390b0c7219f5a8f8db34588dd173d9d0ad9426259aa980574e7bdcb66afa5",
    "signature": "0xe7d4316c2b2704fb84c2e9b877d6dca235a75935cc40b5da9dbc39325f235e347fb54a40ce031a05db6b0afb7ab119cc6c9971d4046eb37bde1aee45b74258281c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}