{
  "manageEntity": {
    "action": "Save",
    "entityId": "224477",
    "entityType": "Track",
    "nonce": "0x798e3205d60616f9366d4b53a77c6da0595ced8f159544da08a1dbe16ba53379",
    "signature": "0xf59fb3b8159e5c2d6f85745822774ad399f4202d4658575e405ceb653aa8ee5d2f8033bba7059d0b6eb64e17010199ea7952701b7274e61fd9a8b3548eb9d3d11b",
    "signer": "0xC2e89988f80875AeCE744F5c816E1E7B62DeF73d",
    "userId": "10793629"
  }
}