{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045216507",
    "entityType": "Track",
    "nonce": "0x8b4533e856177f51b8dbb42b78c62147957807fc190c6ae4f5eacf9884251f5e",
    "signature": "0x9c0b0e22a25b939167cc359dbcff1e749ebe750158d5e3aa7b2a1028a0e25c47361c273061e3f76412b6576e6d4722384cb5fe6f3bc227a51adebd0deff2acf61c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}