{
  "manageEntity": {
    "action": "Save",
    "entityId": "284970860",
    "entityType": "Track",
    "nonce": "0x7484f7296e01df2d17f624147833460a0ab3a2346dd6362813833ffad0d5a3f6",
    "signature": "0x1a23e10669f488139754ce55a08a581f84f27d025aff5648b5a2d8b4a7c56b5b04c14842d774b8dad6f60060eb87e4973c2403c7e4c3ff035338657732069b2c1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}