{
  "manageEntity": {
    "action": "Save",
    "entityId": "635422670",
    "entityType": "Track",
    "nonce": "0x1985bc073ada49025be6f86842686012f88211345a4752e9f0ca56fc3febbf2c",
    "signature": "0xabc2195fd597dc7095540c86b68b4b413a203193c8e255e1128d3e06f1af50f9420925ef648fda971ca9848bc19e0c07c477ce63109f458b81f632d6938e85521b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}