{
  "manageEntity": {
    "action": "Save",
    "entityId": "2043582791",
    "entityType": "Track",
    "nonce": "0x4dcc866849d93ffb4cd4d1f89bc874244971b43879a31c56336b1e1d9097d017",
    "signature": "0x20a5cf5aa8bafecd6bd98ab3ed246c2703b67369e45f4f6b545570ec9e9fcb1676041a948760fd6c86de78b98f03016eaf14a4bcc74a966d9a8a31ea677236f41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}