{
  "manageEntity": {
    "action": "Save",
    "entityId": "1002331819",
    "entityType": "Track",
    "nonce": "0x9a7140e8689146ad9d66c812a67ab03ebaa8c1e5c1c2709442f1f6f6285900ee",
    "signature": "0xc1ff27b46cdb6cd558b92b6afd1d0dc13746afa437417a29fc8d5bb4e4ac6a8d0d574bd6709237a66de025005d036a4212c137527c8cb672933bb662ece70c121b",
    "signer": "0xdA9D567B21f56d3B09080Dee9DE329F020f64644",
    "userId": "176807"
  }
}