{
  "manageEntity": {
    "action": "Save",
    "entityId": "1477704176",
    "entityType": "Track",
    "nonce": "0x79ab70f3e2844cb4f227cbcc3637a005bab6b7f89f0d71389bd78bc8e95ec17d",
    "signature": "0xa4bce4804eb7e9bfa0dffbaf946fbaebfc87eb80747fc0c3a8ec8c55fe8b1a430f6fa14eee68e4cd530b337eafeddd8b5d0fef8ffc92a0dcbc420db0c02334211c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}