{
  "manageEntity": {
    "action": "Save",
    "entityId": "671338",
    "entityType": "Track",
    "nonce": "0xb46559154cf32143b1e126a3c22d4f8fad765cf6d439a40a550a2e104556fd76",
    "signature": "0x1703c3da7bff91219930235489895eba47f86a4e5f635a83a749cdee66fd6981384f9d61a7151593dff2b183583c1ac2934485dd69c6efd355d816022cd4058e1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}