{
  "manageEntity": {
    "action": "Save",
    "entityId": "458283808",
    "entityType": "Track",
    "nonce": "0xac95d4a2bb2bd891385bfa3c9be5f5d942870d4b0f11030c28b7fb9ab3e2b5f1",
    "signature": "0x28e0c00a37756c3946124b12fadc137831635bd75577d3b8da5c859f061c69385d948b9a82670587059ed6036363957595ac0af0e46ce0355c76d6a40a1bb2b31c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}