{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951876734",
    "entityType": "Track",
    "nonce": "0xf1b934a90f55240957f7b1932fe4cd14ac1aaca0d7873cb683e1725ed62ef980",
    "signature": "0xd9a008c23d60bc168e2d75087b7a824cb919972cc39f28f6c0d275c387e27d7918f5bb9ca4408975f9b379e8164f9beb1ca3c7bb61d50fe9277eb1a968c972b51c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}