{
  "manageEntity": {
    "action": "Save",
    "entityId": "799995376",
    "entityType": "Track",
    "nonce": "0xe70b121acbce59f3a9de8514546dcdd4fed69d431325c62a1ed1a88dec164c08",
    "signature": "0x3a04c4515599ab91e739ed5f97f4c45e15627e44734b351a4bda1a02d260610b7174e50c9e2283cc5c581a9ab73028241d4e68b2c8a2d00b03297019daa53cbc1c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}