{
  "manageEntity": {
    "action": "Save",
    "entityId": "996639264",
    "entityType": "Track",
    "nonce": "0x28ba8c9bd93a8451698deaa797de2babba27ec68145acf8864d97e7d3305b575",
    "signature": "0x428a1eefb3ab00c53035337167bbf5331d6705e4a661bfbe8d1625a57081f98f7f3635ed3b95d05593f56b15f6476a8dd0eef6f63ab234b4d49b5513ee75dc021b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}