{
  "manageEntity": {
    "action": "Save",
    "entityId": "555876",
    "entityType": "Track",
    "nonce": "0xcebe69544d06a6093b82a2e1e80857d2d5c47509da28dda860c900b58b63fef4",
    "signature": "0xed4589017d0f94b7e4571594ff3fb84f662e6e7704f5ca1c0badad29ff27d72b05fa1f42380c5e3fa8f9bf6e6a3dc69e01727a175768a3dc5e660c21f3ba10fe1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}