{
  "manageEntity": {
    "action": "Save",
    "entityId": "1583919306",
    "entityType": "Track",
    "nonce": "0x1bdf31ef4240f631097081d740e4d59d9977fb343a4abb680253292c05dcce41",
    "signature": "0xeeb0c145ecb760ba3a29cfa242b82401838684d843be20581e19daa95899cb7b1e9c014eb244ca18136ba77bf24ca767c7ac650443dc3df2b2ea9b99e842fc211b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}