{
  "manageEntity": {
    "action": "Save",
    "entityId": "511708",
    "entityType": "Track",
    "nonce": "0xcd31b3b5ac75275d5689ec30af55f946eded4658fbf2f6d155d599a5311b2524",
    "signature": "0x464baa633accc8e9c33f33afa19d678b98f6889d6f5867af2e31c6b0765620e05abe94795f531330a820c0283f93499d652ba93a76e7b54e4409771946f8005d1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}