{
  "manageEntity": {
    "action": "Save",
    "entityId": "1298723620",
    "entityType": "Track",
    "nonce": "0x26ca51344ee49df3482d0eaf6fc4817b63d5ed67520f0bccc4423118d457819a",
    "signature": "0xe06e6093e8d9c87c5613dfc71da0eb34ea0182d7d65aa6fa53226296dcf4bef301a38f8534e8926fabbdca36401e4f1c239f5220236f569d04a653113082a7511b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}