{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131844155",
    "entityType": "Track",
    "nonce": "0x6cbbd7d48f0e1b21b0e828a43a4f9d609e5a8e16ade4328e188ca5008b19b473",
    "signature": "0xa8bcf2fae5cea531b6acd78eea9aaaae0e56d271c89b77368f442a01e5287ad0768643ddb4fa8731c4756aba92781fe4236ae6e09f5fc82518b1a5bac1008e571b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}