{
  "manageEntity": {
    "action": "Save",
    "entityId": "238914396",
    "entityType": "Track",
    "nonce": "0x3d6371024e3afd17804f8e7835bfacc1703c20b4dae503d2be9da19523c76a66",
    "signature": "0x3a60751f40c5a573319d5ff5fb4ac7b8b7173ff2190bcf8799e23fecda486ddd4a29aa56312055deea7ca8946f31843b36922998ff5974a597695434c750899e1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}