{
  "manageEntity": {
    "action": "Save",
    "entityId": "464312081",
    "entityType": "Track",
    "nonce": "0xc6200b774239d9ccb45e94629385a62379abfbb03581d3308416f4e4a8d66758",
    "signature": "0x96cd7c68963f06bad867d3b291b6e8f3367699f4930e0d0f736e0c625e28fead1a24c141a4f56b7496fa1eb2110b2ba1c94b9e5ed1feb0cb717f24228b4c7ea41c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}