{
  "manageEntity": {
    "action": "Save",
    "entityId": "821838933",
    "entityType": "Track",
    "nonce": "0x45fc96c0160696240c0d4ddc0c2eafd7097b770266d5b36f2c91620b69862a68",
    "signature": "0xd3d1b99d866a05debce4f4936a24e8b412e7b15b52d8f433287583dcbd5e398f2b69e69e59dcda0869666e2f47c22708e51886ba9657d1e430fabcfa578b63d21b",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}