{
  "manageEntity": {
    "action": "Save",
    "entityId": "697959",
    "entityType": "Track",
    "nonce": "0xbc7a07477e3edca063f73cb72555fa9a6a2941c9fc55bf3e5639cc7b43f48b93",
    "signature": "0x9ff000f30cc4144812b594a8972c881d0e40b2ed587aac0d91cbb05e472860b75e66be39a08d8c8183023fae94af4641d7ae8431b893ee08fa128869d69334691c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}