{
  "manageEntity": {
    "action": "Save",
    "entityId": "1153130367",
    "entityType": "Track",
    "nonce": "0xd82575637ed24d7667a6a5b9c05405e44dd9c5c7052c3f1f6296422379868501",
    "signature": "0x305085b1b56bcf82938d9acf130ffbfee531e3767d1feeaa3198e397705041456843f96ad0ed3204d1ae0f1865f3557e3184eb9ebcf4c72384e794a6e5e13e411b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}