{
  "manageEntity": {
    "action": "Save",
    "entityId": "2050506888",
    "entityType": "Track",
    "nonce": "0x1132f7c0fb14a62e7ab49f04799f2336982bc10f9c3f66c735284792336f5c54",
    "signature": "0x05490250100d4423555dc72e823611b7fe8459c49fa06d914d9f802bcf4cc60350f1479ce1b866f9030f35a99a608b98d8569598473966ee8338d01f2434129d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}