{
  "manageEntity": {
    "action": "Save",
    "entityId": "1943183954",
    "entityType": "Track",
    "nonce": "0x89600e9c24c40adf80045aa6d1cdd8ee8c36367d0dfc8eb2cffd2c8da417dae2",
    "signature": "0x568f5e2f01642baeb5fdf6522eb377c17dce912c5f91ff17c815829097e616693eeee568264d29194d54b915b73a52beeb89feeb8c04c6257952fb2e41ae66d51c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}