{
  "manageEntity": {
    "action": "Save",
    "entityId": "1742134002",
    "entityType": "Track",
    "nonce": "0x270678f8ae7123a7cd0d1d7c0dce90d29ab96d41070ef580b2f58668a0f5800f",
    "signature": "0xcb8481ea4a42a661e0f85168ce286aea383145c635a5b9cf65315eb3adcdafb418ec2257a6a1808558c1dcba00db8c9341018de205855df330f90e9ef9d00ae81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}