{
  "manageEntity": {
    "action": "Save",
    "entityId": "289061809",
    "entityType": "Track",
    "nonce": "0x6d2c55272c3ebdde262169228e226cf6d53aece926e61f1a53a059f2d9737433",
    "signature": "0xb619297470117425d0f1156b61d90085590bc16e675d5df576634685c19a09614911cc8449e108c359016b8bbec2f88b69d8e1f0a4cf789bee61c8710d5c92761b",
    "signer": "0x92328BFDeD38C9a9De6E253A0CF5CB46A3B28611",
    "userId": "831117417"
  }
}