{
  "manageEntity": {
    "action": "Save",
    "entityId": "215336607",
    "entityType": "Track",
    "nonce": "0xa35a9d4b5307f28518b19155a1bffbda4a774217c569794f4e078fa29d263783",
    "signature": "0x78246916630a95084df37866b0e13f23470c2ff5ec3d5948be5120b91fe55bb42ad01be5cff9d6f8f7c099e8596f1f5a8d3a87e3ff5e0f2d2e3e9867e88ca6f61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}