{
  "manageEntity": {
    "action": "Save",
    "entityId": "737820543",
    "entityType": "Track",
    "nonce": "0xe08b27ef2ad13e23b4e66879adb6d278c2e2b24d624d9f3c33cd5203ce933aad",
    "signature": "0x0704062a8b59117ec20aa4effc54cf3fe81e2ac228971518709fe88dec7407ff1b0d10dfcb43c01cb756ace0245cbf1f1d010a04cc3b5f6303e09793109ca4851b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}