{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003692348",
    "entityType": "Track",
    "nonce": "0x3de4ed24ae0da833fc684d6fa632ef95319ec884e4e227764023f6260cfbb717",
    "signature": "0x9f3b2859fd47d162e1402d881daeb4740db1ca89ed653adc35f46b35a4edaa7617a56ff8217a341b1d7513ba103932867d85f6c7e91435406ee901d1005585591b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}