{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980719852",
    "entityType": "Track",
    "nonce": "0x9b875223abd4ad128def5be095bf773fb9b946f1336985127ee26e11a22cb14f",
    "signature": "0x3f05b2b786f43125ca824ce2576ba1fd062bd2597683640d6e53d7cf6894ff771315f2cf0e35f7e238ffe70863ef4dc6b836882455b5c603f0d8f05cb1ac5a3a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}