{
  "manageEntity": {
    "action": "Save",
    "entityId": "1049397637",
    "entityType": "Track",
    "nonce": "0xd11e9950325c95163530664c810bac5a8cb343ba46f083ab0f1650b0943a2dbc",
    "signature": "0x5a528c837c8f9547e09274e9097c78ee4bc54b4fa41dbbca31430a234f2c054a43e339f0985700016f9023ace5a5407973642d5de9313784f1b0f0a686faabdb1c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}