{
  "manageEntity": {
    "action": "Save",
    "entityId": "265345670",
    "entityType": "Track",
    "nonce": "0x7897c97c9d165a9f01303ae6c924e5466698969fbeb2cace895053d654fefe5e",
    "signature": "0x2beafae10bacf8f8482ffdf029bc7158773372bc2cd0afe2486dbe90832d6d2e5ed788d46ba08676b89ebcf215248f0eae79d028cca7fa878a7da87760837f8a1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}