{
  "manageEntity": {
    "action": "Save",
    "entityId": "12717946",
    "entityType": "Track",
    "nonce": "0x51c212f0f19d29128e5aeaf0014aea498152353daff1751d476e5a815d701ba2",
    "signature": "0x5d970e483633daae1576c1fdf15fb46f83d48fc27d332c03ba048a1ca63c59e329d2376b8495e4127de6ab605160b78057e861df4a56da4e2a369e8e73e44a891b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}