{
  "manageEntity": {
    "action": "Save",
    "entityId": "543606",
    "entityType": "Track",
    "nonce": "0x777fc85ef326762981a6ee63b4168a037d0f8c7fb0dac96a209569ec7d9c3e34",
    "signature": "0x90df3aeea972fcb7dded206a22434d3a1a3deb025fcad968de45c82083c2d3922ac8f3e30f1fcaebeb3ea8883eccdec2c3219e9666dbf3a622e89ceeb0d5412d1b",
    "signer": "0x5501467AFaA7897fBBD65dE583c7E74577B92f74",
    "userId": "608591950"
  }
}