{
  "manageEntity": {
    "action": "Save",
    "entityId": "247841",
    "entityType": "Track",
    "nonce": "0x38e36d9062260bc4908b1472915f2a2ac7f4f0844998634fc8bd5c0038770c0f",
    "signature": "0xab8d951399e2531f44725a4c61a5868d94352e855b2e9ffd469dc716898caa3c2a2c9ec34014e8d972b064c94094056a57ae0801a0f256ee1b7d3cc8aff709fc1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}