{
  "manageEntity": {
    "action": "Save",
    "entityId": "182454",
    "entityType": "Track",
    "nonce": "0x0c6e57f79ba80516840e2f031c2fba90ee4d1f4d85ec299fa0f2b25f4e3fab7c",
    "signature": "0xfa9725b8030a6e8665e6165a85ca1b812f2789fdb4dcf02bad851d2b7451a8ea27691095d8c34f163e5349240f7f96c57b9db07563edbb892eb3f086c4f593771b",
    "signer": "0x28945B345Dc8334c21B4e932dA506ca6Fac7e18a",
    "userId": "290283513"
  }
}