{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116986004",
    "entityType": "Track",
    "nonce": "0xa4461956ded627b8d15a14af18e0a9c7786511c5e14937a200871fa5440e7fa1",
    "signature": "0x69136157acf21f0ff2bda6c2404f3c558c76cf6fe71383d014ee08b39b6a6ad532f4298d22a4d576da1c36c183ad320381a56da334ed6198de909cb6bbf58af51c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}