{
  "manageEntity": {
    "action": "Save",
    "entityId": "628468241",
    "entityType": "Track",
    "nonce": "0x24d61b412115bcf88af9b20528dd61ff8ffae6354101d4e21f5a3e955ec1c475",
    "signature": "0x873be0ec4d9fec83fc9881f809f9bc95e6718a82045da37fe6aeb26efc105ac05c0e54b527ac3ab4660275d1a261302b336dc9358dbe786779478fa54332a1ab1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}