{
  "manageEntity": {
    "action": "Save",
    "entityId": "585102488",
    "entityType": "Track",
    "nonce": "0xa9c7649032f5881a60e92d5bb7f47fee54ffe33c946e114a7ec5bea71b048755",
    "signature": "0xe81ba73bf93431b019a5c75f174c92677dbd14e41d8f3d7d5629f0d391c935482b7cc1f688c0546fd665358efd5f9aada33910614de9729be6b2134e79e4e44e1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}