{
  "manageEntity": {
    "action": "Save",
    "entityId": "73906468",
    "entityType": "Track",
    "nonce": "0x31a4b3f76a23544e3131b7e36d186a0e6ca87fdd99cb843e5bc9a4e37977c9cd",
    "signature": "0xe9ebf13841610eced2664e573fc8417e9aa206f042d72890360211e17751820454458ea3cbee5ba2c158c71cd2f8d237cb0bad24dca65bef11c283124d7ed08e1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}