{
  "manageEntity": {
    "action": "Save",
    "entityId": "317939",
    "entityType": "Track",
    "nonce": "0x60056c1095fc79e2ffab3079330e2406402fb81fa134e14943fe0974ef88f339",
    "signature": "0xfc28be5dc8757fa819a12b4ee398125e22025b8b1703f9f74fc677ef010e73f84162647318646f8cacf9cb24ba59a60a389b690aeb8c49c1247d8b6c036f779b1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}