{
  "manageEntity": {
    "action": "Save",
    "entityId": "313778",
    "entityType": "Track",
    "nonce": "0x501a73e387367bd84f47f64bdea956eabb3120f2335bf900f7d2323f80fa6c99",
    "signature": "0x08f19614c352d12e160dda52835cb0fd0894f58c18937026a3bf57b2ca7173ee60926a586fe292992ee15b0df6ef37f57cd3b329049e5f4ad81e46047c3027871c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}