{
  "manageEntity": {
    "action": "Save",
    "entityId": "814311",
    "entityType": "Track",
    "nonce": "0xf2b68d0b6cf242e020b99d089467ff2198b3e581ae190b4a7a19ad627d7bb194",
    "signature": "0x20bb379d9f89b0180fd56f80ee6676876548e4e43112703c8f31dcc7ff81f7ce6ccb84437b05fa153c164fa622e1a97a2e3db7187c6bab7e1d03bbc899d7a7881b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}