{
  "manageEntity": {
    "action": "Save",
    "entityId": "1297098741",
    "entityType": "Track",
    "nonce": "0xf6416f224f84c3b2426c25a576063dd835a0db35e7a94c65895ffc41d976cfb1",
    "signature": "0x5f25910fb0d5872fb5d212d2d8765678b11c02c4872c53db7485f6cbe9c0c52e511c00a1863d5a7aeef81efb8a1dc38ad2e559adb9805a40c4d94547da60aa991c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}