{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807637418",
    "entityType": "Track",
    "nonce": "0x8267ea2f9746a1303472342fdba79d012a0bd77511321b9b70c38b8ac1e54eb0",
    "signature": "0xaeeec207f7fd4605cc299e47bd9e9abedb0597a2fb88f2b5502e79e5afc6f23a38c243f392c8e0fd767205c2ccd1fde900df65fd45267d86f083b021c32a74e41b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}