{
  "manageEntity": {
    "action": "Save",
    "entityId": "870647939",
    "entityType": "Track",
    "nonce": "0xb29ff7ad8ca60ef005aec34c6595023a76719bfc49f2c4a2a792b91958ac365d",
    "signature": "0xe5012d4fb2c2b1ba1a65d082f3001293a828c38ff60f94a0730fb8547b8670b20501c647a4abd6be26b06e14a8e4d6ee03a46a2a3aa9569d7b973616dd893e691b",
    "signer": "0x1f8DBD1C8dF2FBBaf87feb00184F2aEC947219cD",
    "userId": "768134911"
  }
}