{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230758276",
    "entityType": "Track",
    "nonce": "0x961298d516e3f2031964804e949126b7ad1595fe923d823a7bdb15ae6a01c34c",
    "signature": "0x74ffb8b4acdb6bc49f0d06285be9d787073eeb219652cca8ca02e2e7b16b351801c069bf039ba895382dd70a7ce1ab3c5b95c50b1eec87ec9c845bec256caa8c1b",
    "signer": "0x0a5148A3f132E6696c1Cd3FDA8465fC5fF17d3D2",
    "userId": "803288761"
  }
}