{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908355532",
    "entityType": "Track",
    "nonce": "0xa19d866c28a8ca9cc7844086606ca7ec0772b63c29bb2537f35aadc25c8e8375",
    "signature": "0x4f2fb4aaa91e26d54a578a1dde5aede9944195278e363f41b0032f5ea46aaf91797685c83caac083d008e5e792a308086b4666e30142e50630dcc37eaaac46711c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}