{
  "manageEntity": {
    "action": "Save",
    "entityId": "1314384636",
    "entityType": "Track",
    "nonce": "0x186cfd5b1fa78fa54bf5c2517fb47256ee7090f9ed31664f86e43a025f657e8a",
    "signature": "0xdb4af0d4df0fc2db7723955b4a27f6b461930205f3bb11e2a64690f0646b18ce13e1aea2a74b1fcc7a1677f2600455e452bb86e8fff059f3ac759525b3f53d361c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}