{
  "manageEntity": {
    "action": "Save",
    "entityId": "310073",
    "entityType": "Track",
    "nonce": "0x8b6488bbb1ab2f761f7ec53be8aa34f1f83d2578c75e9ce9177f1797013e63cc",
    "signature": "0x5618d556f4d83fc628faaca09343c65ccd0be3a394674ad9c0749f6cbeef7dc9631017da6b49a4ee9f059e48e7e2684bcd747753bc2d7a2afbc8cae232b4e50b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}