{
  "manageEntity": {
    "action": "Save",
    "entityId": "789659287",
    "entityType": "Track",
    "nonce": "0x3a8a4fb1764c1d029051e54d6e1e1c8e4f38546192c6ee99a6bbfa7aa4eb2d78",
    "signature": "0x34b9f402c1a38b81399ca9d590168b57bc02e65ea3fa6540d2248063780051b17c2381213c0509224bec7ca3e3bc64b10352d9f5b73d8f5e91453154c00d4fc81c",
    "signer": "0x98591a180A20DF036EB2C9D2c24B449E65939Df5",
    "userId": "338604526"
  }
}