{
  "manageEntity": {
    "action": "Save",
    "entityId": "414319761",
    "entityType": "Track",
    "nonce": "0x307a89d70604cd4f4e26134369ac190ca4cc43a25a8740ad2b8d2dda423c3107",
    "signature": "0x0bc108590d5ebe4a7e5576b9a256ed76fc30c5f1f22a551562b17c14f331f55c4086a6e0b96c3b3a116c53e2273153878d3b8052822fa8516d95297930e7f58e1b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}