{
  "manageEntity": {
    "action": "Save",
    "entityId": "261594958",
    "entityType": "Track",
    "nonce": "0x4af074293a562119ed1d20e9edd66f88963ccd17a37f49e19ac4afdbc2c135e5",
    "signature": "0xc35f1b703ef0951fe1d5e2f22f7e33e86946a6a3b79dd69ce671029676e56e2d64e171a4753716a4ed054ea588718085f19821b3c13ab0e238e1e246aa8256741b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}