{
  "manageEntity": {
    "action": "Save",
    "entityId": "1325085247",
    "entityType": "Track",
    "nonce": "0x8475ea7049d170b10d7f4fb9e4a4983c8cc0a0a0711aa13cc77cbfc93297b41f",
    "signature": "0x9d948845aba0a074d4a4e804031c5716e358ae630cb634398a18a41a1299f146026dd45632fd372f75559ac8c79e4895f4621d2583f412ea8842e44219edae081c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}