{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963912492",
    "entityType": "Track",
    "nonce": "0x06a4b0b0c09cf6e753b216577b88f7ce3522e1f7ebd4353862186fe603d5aae4",
    "signature": "0xb3e5878b5a9eecccf3851c92e9d5b3a314fb03e19c2eb0bb96dbc090db32690d71fb5ac74fbf2b5e3fd27b3b3edf18deecc20c41ecb960bfb3a3c0226b9edbef1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}