{
  "manageEntity": {
    "action": "Save",
    "entityId": "62524085",
    "entityType": "Track",
    "nonce": "0xa8f322d65799086097acb26a046ce40699ee9f6a6904d2616618fca88b439d18",
    "signature": "0x3812076231e2e7890f85c05192358e166d2938d96066e4dae9653b396086180872c030edbdf81fd53d08655843f956d44c9b894320332b92f938ac9b7707aaee1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}