{
  "manageEntity": {
    "action": "Save",
    "entityId": "1810527396",
    "entityType": "Track",
    "nonce": "0xcff84f47c939b4e8735637a9a87641e9a832c0dad65e21021f1495a385e519f6",
    "signature": "0xecd00c17f8d97c2d401ba8fbf624efc04dfa5f92a7582d08e77d13a8ae9463f85e2406ac6a49abdd23d1f9eba9c9ae4bf381159ebf89abe2c77ee4b71b4a0ad51c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}