{
  "manageEntity": {
    "action": "Save",
    "entityId": "20376808",
    "entityType": "Track",
    "nonce": "0x3fb8b7088156fefc79b4a139464ef0931c68d76aff3cc904d0d1d8953c88f1f7",
    "signature": "0x3599f244d1251c65bcba8fb1fc6bd2fb4b27d5a3fec5e8cd0243b55da774ad7d1ce00366b5931bf053c228148ca38a4c3e8fafb0be3f21d8d86011662ef4ba961c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}