{
  "manageEntity": {
    "action": "Save",
    "entityId": "569028",
    "entityType": "Track",
    "nonce": "0xee75bf66c5f951f8ec7ac63444bc0611e4d8277379a8b31d0e194945cc4a7a89",
    "signature": "0x4cfdbb1ab1aff17b0c8e01a1626215f7136cd60a4200811c61e32772f6e057e8608e9b2bddc8e1ebd7b0703bf22d371557f428771d7f557930fcda15451e09091b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}