{
  "manageEntity": {
    "action": "Save",
    "entityId": "682394956",
    "entityType": "Track",
    "nonce": "0x1952f31502f648ac3052b0da806a0125522bc8fb1d7695c4712c4d7c739406e4",
    "signature": "0x6dbbc3d6e6cadbf7ead4b6fdd755ec567a45be85719e5784dd4078e6cedb163130818d402a014459931e4c3c77b6cf2d5ac62bb5abb0624f0b184c3068263d3e1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}