{
  "manageEntity": {
    "action": "Save",
    "entityId": "2133104413",
    "entityType": "Track",
    "nonce": "0xe020d1354b96b39814564a314e462438b93bf44c70001a07c88116ec7f7dc1c2",
    "signature": "0x4609db3310ebf9e214b08ecead32afd7704f5503c36e99f27e7d1d5de7f6e004391d2499caebc8dde2ab83f6691082381a762f0d55270016ef3263f03a03d4201b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}