{
  "manageEntity": {
    "action": "Save",
    "entityId": "969186235",
    "entityType": "Track",
    "nonce": "0x3a59962414afeaf92d8cce22bc3e5528fdc6d9b32dc296a7257fe28709eb70cc",
    "signature": "0x2141eaee45ec48462c1a4777e137e9e17f8b0ce20eeed3a7bcb13a6b35a330bc64c172c3722952cc2b144486f22c5c30352cea082d5b53c4845d44b518fa47c61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}