{
  "manageEntity": {
    "action": "Save",
    "entityId": "962594136",
    "entityType": "Track",
    "nonce": "0x5ebacc06fc3fa78f233028d7d5d47354e2adbdadcdcab8ea7e2b87aca9883d6f",
    "signature": "0xd818d903bf45163f6b6f8c7e9f07859e01b3c03c3ace1a900d6a66a3f063b88e1b9648296aa67718100aafe0abff75a061486ed991cd1b0a4aa848f43cd99f901b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}