{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913883292",
    "entityType": "Track",
    "nonce": "0x7986208a91af7ad12bfa1b419c065a7c3a3e384baa089b00252e43b704e16b04",
    "signature": "0xfb695a3b70bdd312da7d17c9285457bb15a2d36b268a70328f8dc9c845ce4ca76785dbf7463a8af21e001aa9d48ad8839d818191b92098643895fb08700fb35c1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}