{
  "manageEntity": {
    "action": "Save",
    "entityId": "1551511367",
    "entityType": "Track",
    "nonce": "0x6f36604a965cf8a4f5eb5c493cddd1f4ec46d972aeb3d8e644ffbdb3e969d923",
    "signature": "0xaf83048bd695f34d0a479d6a9b0e00c6e6571f30f6ef543b8e05cadbdf115c632f9ad0b8c96a3604445f26fe2a3185566fe8df8859f2a3d09b1d30ca1d4938431c",
    "signer": "0x4A3D09CdfD42dE4C57dc67B09a40B5d9172bD69f",
    "userId": "787102835"
  }
}