{
  "manageEntity": {
    "action": "Save",
    "entityId": "735540945",
    "entityType": "Track",
    "nonce": "0x98ee5b9534b12f1c05b44a65bec890b5461ecc9b0395e8a62117242057961e69",
    "signature": "0x02b7933567ce86102ea6d2d989d03669533065e52ed4834cbab5905bb7bccf29316f94c6ff2dea5d261542a927fa74e3d6868d9b0f5d77fc924c050293adfb491c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}