{
  "manageEntity": {
    "action": "Save",
    "entityId": "1320266053",
    "entityType": "Track",
    "nonce": "0x89b5264d85ecb552dc7bb272c9fd806fb65d67a12a3ab9397350985c149d516e",
    "signature": "0xb7debcc558f52e322ee578fa5d641297c382fdc9c2a19d7cc9605a61f14d0d5d6f2130be4cc73cc3bfc6773addb4f199d7ff961d652d7d1e6c799ecee2a0d1c01c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}