{
  "manageEntity": {
    "action": "Save",
    "entityId": "534258",
    "entityType": "Track",
    "nonce": "0x77c825d40736e99e8091ea4a387b32240f55ec56ad8aac33fe8ea9dc8dd1aa69",
    "signature": "0xe414d20913c9be1c10085de8eafc4ce7b259d79505da5f666e82817cf7afadc1278460f032ebeadbc3ea087415145e45c4bcaf6187b05a371bb33fa6dd62dde01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}