{
  "manageEntity": {
    "action": "Save",
    "entityId": "544192",
    "entityType": "Track",
    "nonce": "0x358693296cb6435e9586b477a72cb7376505c8144e4e71062abf8d6387420ced",
    "signature": "0xf2b8df9cf2eaba64edad5eeecfd695cf900497ed944101f6e5c090cb5340dc1c6115bebb42c36996369a836ae59117cabf1d3de1fc2bdc9886f8d5cfdc824bc11c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}